Counterweight



` mmm@ Feb l 9 M27 M. F. YoUNT COUNTERWEIGHT Filed Nov. 18, V1925Patented 1, 1927.

MILES F. YOUNT," 0F BEAUMONT, TEXAS.

COUNTERWEIGHT.

Application led'NovemberAS, 1926. Serial No. 149,160.

This invention relates to counterweights and more particularly to acounter-weight for the walking beam structure ot' Well pumpingapparatus.

An important object of the invention is to provide a device of thischaracter which is so constructed that it may be read'ly shifted uponthe walking beam and rea ily held in any adjusted position thereon. Itis here pointed out that the purpose of a counterweight of thischaracterv is to counterbalance the weight of the rods of the well andsince these rods weigh from four to six thousand pounds, dependingupon'the depth of the well, the counterweight must, therefore, be ofsuch size that it would be considerably in the way and awkward to handlewhen the rods are disconnected from the walking beam. As the rods mustoften be disconnected, it will be obvious that a counterweight suitablefor use in counterbalancing the weight thereof must be capable not vonlyof the ready adjustment above called for, but mustk likewise be capableof being secured firmly in position over the center of balance of theWalking beam,so that it will not unbalance the walking beam, and renderthe operation 'of disconnecting and re-connecting therods extremelditiicult.l

A further object of the invention is to provide a device of thischaracter which may be readily Iand cheaply produced, which will bedurable and'etliclent in service and a general improvement in the art.

These and other objects I attain by the construction s own in theaccompanying drawings, wherein Jfor the purpose of illustration is showna preferred embodiment ot:-`

my invention and wherein Figure 1 is a side elevation of a'fragment of awell drilling rig showing a counterweight constructed in accordance withmy invention applied to the walking beam;

Figure-2 is'an end elevation partially in section of the counterwei ht;

'Figure 3 is a longitudinal Sectional view throughthe counterweight;

Figure`4 is a detail view showin struction of the swivel head of tlgiingscrew. I l.

eterrlng nowV more particularl to thel drawings, the numeral 10 generaly designates the Samp on post of well pumping apparatus and 11 thewalking beam supported thereby through a pintle shaft 12, the ends otwhich engage in bearings provided by a eclamp# In accordance with myinvention, I provide a counterweight comprising a heavy metallicblock-19 formed centrally of its` bottom tace with a longitudinallyextending channel 2O of slightly greater Width than the Walking beam.The upper Wall 21 of this channel is provided at its ends with coves 22and the arms 23 formed by the channel and coves are connected inalignment with each cove by shafts 24 having arranged thereon rollers 25prevented from transverse ,movement with relation tothe casting 19 byengagement of the side faces of these rollers with the side walls 26 ofthe coves. It will be obvious thatthe coves are ot' less width than thechannel and that the shafts are so positioned that between the sideedges of the coves and the arms23, these shafts are supl ported from thebody of the casting against any vertical movement. The upper t'aces ot'the shafts between the arms 23 and the walls of the cove' preferablyoperate within grooves 27 formed in the upper wall 21 ot the channel.Rollers 25 are ot\s11ch width that the),v will pass readily between thenuts 28 upon the upper ends ot the securing elements 15 and thus permitthe counterweight to be lo cated immediately above the saddle 13 andaccordingly at a point where its weight offers the `least possibleresistance to manipulation of the'beamll.

One arm 23 has formed in each end there of a pocket 29 which isintersected by a transversely extending bore 30. Rotatably directedthrough this bore is a bolt 31 which is threaded through a nut 32positioned within the pocket. The inner end of the bolt 32 has gswiveledthereto a serrated disk 33 which, by'retraction of the bolt, lmay bewithdrawn within a recess 34 provided at the inner end of the bore bycountersinking the saineM lhe'se disks, by proper operation of thebolts, may be forced inlto engagement with the side tace ot the beam andwill selll() curely lock the Weight in adjusted positions. To furtherfacilitate manipulation of the counterweight, eyes may be cast into thetop and in opposite ends thereof when the body 19 is constructed.

It will be obvious that during operation, the eounterweight will belocated at the pitman engaged end of the beam 11 and in this positionwill counterbalance the Weight of the rod 17. When it is desired todisconnect the rod 17 from the beam, the counterweight may be shifted tothe center of the beam and there secured in position. At this time, theWeight will offer but little resistance to movement of the beam, such asis .necessary to shift the beam out of the pumping position to theposition which it occupies when itis tilted to permit removal of therods or well tubing.

Since the construction hereinbefore set forth is capable of a certainrange of change and modification Without materially departing from thespirit of the invention, I .do not limit myself to such specificstructure except as hereinafter claimed.

I claim 1. In a counterweight structure for the Walking beams of Wellpumping apparatus, a heavy metallic body provided in its under face Witha channel receiving the Walking beam, rollers within the channel adaptedto engage the upper surface of the Walkingl beam centrally thereof andmeans directed through the body at one side of the channel forclampingly engaging the Walking beam to maintain the body in adjustedpositions thereon.

2. In combination With the Walking beam of Well pumping apparatus, acounterweight having supporting rollers engaging the top of the beamwhereby it is readily shiftablc upon the beam from a position Where itis disposed adjacent one end of the beam to a position Where it overliesthe pivotal eenter of the beam and means for securing the counterweightin adjusted positions.

3. In a counterweight structure for the Walking beams of Well pumpingapparatus, a heavy metallic body provided in itsunder face with achannel receiving the Walking beam, rollers vWithin the channel adaptedto engage the upper surface of the walking beam centrally thereof andmeans directed 'through "the body at one side of the channel forclampingly engaging the Walking y beam to maintain the body in adjustedpositions thereon, the upper Wall of the channel having coves into whichsaid rollers eX- tend and against the side faces of which the rollersengage to limit movement of the rollers transversely of the body.

4. In a counterweight structure for thel Walking beams of well pumpingapparatus, a heavy metallic body provided in its under face With achannel receiving the Walking beam, rollers Within the channel adaptedto engage the upper surface of the Walking beam centrally thereof andmeans directed through the body at one` side of the channel forclampingly engaging the walking beam to maintain the body in adjustedpositions thereon, the upper Wall of the channel having coves into whichsaid rollers extend and against the side faces of which the rollersengage to limit movement of the rollers transversely ofthe body andshafts upon which the rollers are mounted directed through openingsformed in the arms produced by the channel. and having those portionsthercof lying between said arms and the adjacent edges of the rollersabutting the upper wall of the channel to be supported thereby.

5. In a counterweight structure for the walking beams of Well pumpingapparatus, a. heavy metallic body provided in its under face with achannel receiving the Walking beam, rollers Within the channel adaptedto engage the upper surface of the Walking beam centrally thereof. oneof the arms produced by the 'channel having sockets in its end edges,said arm having bores intersecting saidsockets, nuts Within the sockets,bolts directed through the bores and engaging the nuts and clampingheads upon the inner ends of the bolts for engaging the Walking beam tomaintain the body in adj justed positions thereon.

6. In a counterweight structure for the Walking beams of Well pumpingapparatus, a heavy metallic body provided in its under face with achannel receiving the Walking beam, rollers Within the channel adaptedto engage the upper surface of the Walking beam centrally thereof, oneof the arms produced by the channel having sockets in its end edges.said arm having bores intersecting said sockets,fnuts Within thesockets, bolts directed through the bores and engaging the nuts andclamping heads upon the inner ends of the bolts for engaging the Walk-Aing beam to maintain the body in adjusted positions thereon, the innerface of the arm having recesses into which said heads may be Withdrawn.

In testimony whereof I aflix my signature.

MILES I?. YOUNT.

